To create rips in jeans, start by using tweezers to gently remove threads from the desired area. Then, use scissors to make small cuts along the edges of the frayed area. Repeat this process until you achieve the desired size and shape of the rip. For a distressed look, use sandpaper or a pumice stone to rub the edges of the rip to create a worn-in effect. Finally, use a razor blade to make additional rips or cuts if necessary. Remember to handle the razor blade with caution and follow safety precautions.